msm: 8960: add ath6kl_wlan_power function to control AR6004 gpio

Add necessary functions for AR6004 to control BT related GPIO.
This change will only be used by AR6004

(cherry picked from commit 9baad179a8a7996e1912de14eb6f02f17c932e03)
(cherry picked from commit 493557fce821ae201b4cc3c6a125d703ac5de60e)
Signed-off-by: Ming-yi Lin <mylin@codeaurora.org>

Change-Id: I0fb3a59761dc3e994254bdc0241281e4bbcdf402
Signed-off-by: Neha Pandey <nehap@codeaurora.org>
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 0c3f994..da38122 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -500,6 +500,10 @@
 	help
 	  Select Y to enable Slot 3.
 
+config MMC_MSM_SDC3_POLLING
+	boolean "Qualcomm SDC3 support"
+	depends on MMC_MSM
+
 config MMC_MSM_SDC3_8_BIT_SUPPORT
 	boolean "Qualcomm SDC3 8bit support"
 	depends on MMC_MSM_SDC3_SUPPORT